TY - EJOU
AU - Sun, Cheng
AU - Zhao, Chen
AU - Wang, Guohua
AU - Mao, Qianwen
AU - Han, Rong
TI - Cerium Oxide Nanoparticles Alleviate Enhanced UV-B Radiation-Induced Stress in Wheat Seedling Roots by Regulating Reactive Oxygen Species
T2 - Phyton-International Journal of Experimental Botany
PY - 2025
VL - 94
IS - 2
SN - 1851-5657
AB - Enhanced UV-B radiation represents a major environmental factor impacting global cereal production. Researchers have explored various approaches to reduce the detrimental impact of UV-B radiation on crops. Recently, engineered nanoparticles, particularly cerium oxide nanoparticles (CeO2-NPs), have attracted widespread interest for their ability to boost plant tolerance to a range of abiotic stresses. This study investigates how CeO2-NPs application affects the morphology, physiology, biochemistry, and transcriptomics profiles of wheat seedling roots subjected to enhanced UV-B stress. The findings demonstrate that CeO2-NPs notably promoted root length, fresh and dry weights, and root activity (p < 0.05) under enhanced UV-B stress. CeO2-NP treatment reduced the content of hydrogen peroxide (H2O2) and malondialdehyde (MDA) in wheat, alleviating oxidative damage in seedling roots and partially restoring the root phenotype. Under non-UV-B stress conditions, CeO2-NP treatment triggered the difference of 237 transcripts in plants relative to the control group. Under enhanced UV-B stress, CeO2-NP treatment exhibited differentially expressed genes (DEGs) linked to the antioxidant defense mechanism responsible for reactive oxygen species (ROS) scavenging, compared to the non-nanoparticle control. This suggests that ROS scavenging may be a key mechanism by which CeO2-NPs enhance wheat resistance to enhanced UV-B radiation. This study elucidates a potential molecular mechanism through which CeO₂ nanoparticles may enhance wheat tolerance to UV-B stress.
KW - Cerium oxide nanoparticles; UV-B stress; ROS scavenging; transcriptomics analysis
DO - 10.32604/phyton.2025.061462